(meteorobs) IMO Shower Circ.: Draconids 2005

[Mikhail Maslov]

It seems that this outburst could be caused by particles of 1953
trails ejected several months before 1953 perihelion of 21P, when the
comet was only awakening to activity. I plan to develop this vision
in the coming months, maybe with some articles.

Best regards, Mikhail Maslov


RA>            -------------------------------------
RA>            I M O   S h o w e r   C i r c u l a r
RA>            -------------------------------------

RA>                   DRACONIDS 2005, visual

RA> An outburst of Draconid activity was observed from
RA> Asian and eastern European geographical longitudes
RA> on October 8, 2005. The activity was also observed
RA> by radar technique with highest rates at a solar
RA> longitude of 195.44 (2005 October 8, 17h UT). With
RA> a population index of r=3.0, an equivalent ZHR near 
RA> 150 was derived (Campbell-Brown et al., Univ. of
RA> Western Ontario). Visual rates may be lower due to 
RA> the different range of larger masses causing visual
RA> meteors.

RA> -----------------------------------------------
RA> Date (Oct)   Solarlong  nINT  nGIA   ZHR    +-
RA> -----------------------------------------------
RA> 06 19:20   193.5640      4     2     2.0   1.1   
RA> 07 16:00   194.4114      2     2     4.1   2.4   
RA> 07 18:50   194.5291      5     4     2.5   1.1   
RA> 08 14:10   195.3250      2     7    19.5   6.9   
RA> 08 16:10   195.4026      6    18    34.3   7.9   
RA> 08 18:30   195.5016     10    49    15.3   2.2   
RA> 08 19:50   195.5589      8     8     4.0   1.3   
RA> 08 21:50   195.6417      8     7     3.7   1.3   
RA> 09 07:10   196.0252      4     2     2.6   1.5   
RA> -----------------------------------------------

RA> Solar longitudes refer to equinox J2000.0. ZHRs were
RA> computed with a population index of 3.0 in accordance
RA> with the radar ZHRs. No personal perception coefficients 
RA> and no additional zenith correction apart from sin(hR) 
RA> are applied.

RA> We are greatful to the following observers sending in
RA> their data quickly:

RA>   Ricardas Balciunas (Lithuania), 
RA>   Jiang Chang-gui (China), 
RA>   Rong Chen (China), 
RA>   Audrius Dubietis (Lithuania), 
RA>   Bo Gao (China), 
RA>   Yandong Hu (China), 
RA>   Carl Johannink (Germany)
RA>   Velislava Kiryakova (Bulgaria), 
RA>   Jens Lacorne (France), 
RA>   Ming-hui Liang (China), 
RA>   Xuan Liu (China), 
RA>   Jin Ma (China), 
RA>   Veikko Makela (Finland), 
RA>   Mikhail Maslov (Russia), 
RA>   Alastair McBeath (UK), 
RA>   Koen Miskotte (Netherlands), 
RA>   Markku Nissinen (Finland), 
RA>   Jurgen Rendtel (Germany), 
RA>   Svetlana Slavova (Bulgaria), 
RA>   Valentin Velkov (Bulgaria), 



RA> Rainer Arlt, 2005 Oct 14